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Finding the Fourth Proportional to 68,839.77, 95,003.79 and 38,628

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Solution

The fourth proportional to 68,839.77, 95,003.79 and 38,628 is: 53,309.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,839.77 : 95,003.79 = 38,628 : x
  2. Step 2: Convert to fraction form
    68,839.77/95,003.79 = 38,628/x
  3. Step 3: Cross multiply
    68,839.77x = 95,003.79 × 38,628
  4. Step 4: Simplify right side
    68,839.77x = 3,669,806,400.12
  5. Step 5: Solve for x
    x = 3,669,806,400.12/68,839.77
  6. Step 6: Final answer
    x = 53,309.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.